Brake mechanism



Nov. 18, 1930. F. w. PICHE I I 1,782,176

BRAKE MECHANISM Filed June 6, 1927 2 Sheets-Sheet 1 Nov. 18, 1930. F. W. PICHE BIRAKE MECHANISM,

2 Sheets-Sheet 2 Filed June 6, 1927 43"5ATTORNEYS Patented Nov. 18, 1930 om n PATENT r fi rna vxwsrlonn, or Dmnorr, MICHIGAN g i fBRAxE mcmism' j v,The present:. invention relates to abrake mechanism and has for its object to provide an i'mprovedxbrakecontrol means for use in'selective'ly braking the traction'wheels or 5 members of motor'vehicles or other power driven machine s where one or more of said 'WllGBlS or members may have losttractlve engagement Wlth'thG ground and where 1t1s desired ,to employ the tractive force ,ofvthe members to drive the ating or control means adapted to permit selective operation after movement from a normal release position to a predetermined point or position andincluding guard means arranged for automatic release by the control means when moved to said point which i is also arranged to efliect automatic return of the control means to the point from which 0 selective operation takes place.

A further object of the invention is to pry vide a selective brake mechanism-havinga simple, economical form ofconstruction, particularly adapted for use with motor vehicles, tractors and the like having one or more sets Y of traction wheels or members certain of which may from time to time require 'individual -braking for different reasons while others arebeing driven toadvanoe the ve hiw To these and other ends the invention resides in certain improvements and combmations of p'a1 ts, all as will be hereinafter more fully described, the novelfeatures being pointed outin the claims at the end of the spe'cification. a

f In the drawings:@ I 7 l Figure 1 is a diagrammatic plan view illustrating in part a metor vehicle chassis or position tions and V frametowhich the present inventionis shown Figure2 is a fragmentary side elevation illustratin oneembodiment of the im roved e V e 3 brake control mechanism in which the operatlngparts' are shownin normal brake release Figure 3 is Figure 4 is a detail sectional plan taken on line 4? -44or FigureQ; m

Figure'fi is-a side elevation similar to'Figure 2 showing the operatinglevermoved to a'position at which it'haseffe'cted release of theguard means and from which position it I istree to be moved to either'of its selective brake' applying positions;

Figure 6 is a rear elevation of the arrangement shown lnFlgure 5 wlth the brake lever, 1n one of 1ts mclmedselective control posi- Figure 7 is a detail section taken on line 7 7 -of FigureQ. v

' Similarv reference numerals throughout the several views indicate the same parts The present invention is applicable to the brake systems of various typesof motor vehicles whether ofthepleasure or commercial type and may be 'usedkwith any power driven machinejhaving traction wheels or.

other traction elements by which the machine is advanced; It is particularly adapted for use with motor vehicles having a pair of differentially driven wheels and axles,

not only to afford selective or' individual braking of the wheels but simultaneousbraking of the same as required in a'reg'ular speed reducing brake. The; invention, though being'particularly applicable to hand operated brakes of the wheel drumtype may be readily adapted to other forms of brakes shifting of one or more partsto'difierentcontrol'positions. v f

r The invention comprises, generally speak? ing,-a control elemenh such for example, as a lever having a selective movement to position thesame for cooperation withthe brakes or operating part-s therefor to actuate the same either individually. or both together a rear elevation of the operat- -mg mechanism shown'm Figure 2;

designed to be: selectively controlled by the r and further embodies'a locking or guarding device for holdingthe control means against direct movement from a normal to certain operating positions while permitting it to be moved directly to other operating or control positions. It further embodies guard .means for the control or. operating device, whichis automatically moved and released by the latter during a predetermined moveinent thereof whereby selective operation may be afforded entirely by'the use of one hand. in a simple manner and witha min mum number of parts.

.In the drawings illustrating one embodiment of the invention I have shown in Figure 1, a' portion of a imotor vehicle frame or chassis embodying a transmission housing 10,

a torque tubell', a diflerential casing 12, axle housings 13 and traction wheels 14. The wheels are driven in the usual manner through the aXles 15 by a differential mechanism of a well known type indicated, generally, at 16, in Figure 1. Thebrakes whlch,

in the present instance, are of the internal band type, are enclosed in the brake drums 17 on the wheels 14 and are operated by the usual transverselyextending brake shafts 18 -an'd 19 having arms20 and 21 with which are connected thefo'rwardly extending rods Y22 and 23 respectively. The brake release springs 24 may be located at any desired point, being interposed in the present instance,- between the axle housings 1 3 and the arms 20 and 21 on the transverse shafts 18 and 19. The front'ends of'the rods22 and 23 are pivotally connected with suitably :supported transverse rock shafts 24 and 25,

respectively, from whichlare extended for- .wardlythe brake operating rods or connections 26 and 27. They front ends of said connections are shown pivotally connected in Figure 4 with a pair of vertically disposed brake actuating parts 28 and 29 shown, in the present-instance, in the form of levers or arms adapted to swing on a pivotal support 30. The support 30 is preferably in the form of a detachable pivot pin or bolt having its inner end inserted ina sleeve or bearing 31 on the cover 32 of the transmission housing 10; as shown in Figure 3 and having its outer end proj ecting laterally from the housing. The pivot ,pin is held in the desired position of adjustment, preferably, by a set screw 33. The'brake; actuating parts 28 and 29 are spaced. apart on the pivotal support 30 and between the sameis disposed a controlor operating element 34 in the form of a lever mounted both fora-pivotal and a lateral swinging or rocking movementwhereby it may be operated in three different planes, in one of which it is normally held and in which it is movable to effect simul-' 'taneous' operation of the brake actuating parts 28 and 29 as when in the vertical position shown in Figures 3 and 4. 'In the other or relatively inclined positions, one of which is shown in Figure 6 it is adapted for movement to effect separate or individual application of the brakes as pointed out hereinafter. The lateral rocking movements are permitted. by loosely sleeving a block or bearing 35 upon the pivotal support 30 and within an opening. 36 of the lever 34, the bearing havingits peripheral face or portions thereof convexly curved as indicated in Figures 3 and 6 so that the lever is free to rock thereon wherebyit can be shifted to different relativelyin'clined planes when it is held against lateral movement by the guard means therefor hereinafter described. The lever is made athick enough at itspivotalpoint to hold the brake actuating elements 28 and 29 spaced apart and has its sides tapered for a short distance as shown in FigureS to permit it to berocked'in opposite directions so that its lower-end can be shifted to clear or engage either of the inwardly projecting lugs 28" and-29 of the actuating parts 28 and 29 by movement from the central position shown in Figure 4 in which'the lever is adapted to effect simultaneous application of the brakes when aflrearwardpull is exerted on its upper end in moving it from the position shown in Figure 2. J The operating lever is forked at its lower end or provided with spaced jaws or extensions 37 adapted to straddle a latch bar 38 spaced from and suitably supported, preferably by laterally projecting lugs 39 on the transmission housing 10 to which the bar is connected by bolts 40. A. latch or look member 41 is provided for the lever which is pivotally disposed between the extensions 37 upon a pin 42 projecting therethrough. The latch is adapted to engage the teeth 43 of the bar tolock the lever, only when the latter is in position to apply both brakes through engagement with the 41 in looking position,

Movement of the operating lever 34'to either ofits inclined selective braking positions is permitted only when the lever is in one or more predetermined positions, one such position being provided in the present instance by reducing the deptliof the latch bar at its rear end to permit the lower extensions 37 of the lever to pass over the bar at this point when the lever is moved laterally to either of said inclined 'or selective braking positions.

example, to retard a wheel which spins idly through failureito grip the ground and to thereby directthe driving force into the opposite wheel the operator, on gripping the upper end ofthe lever will first move it forwardly until its lower end movescthe guard to release position indicated in Figure 5. From this positiomthe lever is rocked either to the right orleft as the case may be until it is in the required inclinedplane with its lower end clear of the latch bar. The operator will then exert a rearward pullon the J upper end of the lever and its lower end at this timebeing in engagement with only one of the actuating arms will effect application of the particular brake connected therewith while the other brake will remain in release 7 straightened up and centered between the arms 28 and 29. During this time, the spring 52 in returning the depressed guard to normal position will cause it to complete the camming operation so that the lower end of the lever will again occupy a position within the recess 54ofthe guard as shown in Figure 7.

While the invention has been described as appliedto the control of vehicle brakes, it is obvious that it is not necessarily limited to brakes of this classand the exemplary embodiment herein disclosed is, of course, capable ofvarious modifications within the scope of the appended claims.

I claim as my invention:

.1; The combination wit-h a vehicle frame having a plurality of traction members and brakes therefor having different actuating" parts, an operating device for said actuating parts mounted for movement to difierentselective positions to effect individual opera tion of said actuating parts and a guard for said operating device arranged to be moved to release position by movement of the operating'device to a predetermined position in advance of its movement to said selective positions.

2. The combination with a vehicle frame i havingia plurality of traction members and brakes therefor having different actuating parts,'an operating lever for said actuating parts mounted for movement to dilferent operating positions to elfect independent opera-tion of said actuating parts and a guard for said lever normally holding the lever in a predetermined position from which the lever is movable to elfect automatic release :thereof from normal to a of the guard "whereby to permit each of the actuating parts to be moved by the lever.

3. The combination with a vehicle frame having a pluralit of traction members and brakes therefor avin different actuating parts, an operating devlce for said actuating partsmounted for movement to effect inde pendent operation of said actuating parts and also movable to effect simultaneous operation of said parts and a guard for said operating device arranged to be released by movement ofthe latter from a-normal to a predetermined position from which the operating device is movable to elfectselective operation of said actuating parts.

4. Theicombination with a vehicle frame having a plurality of traction members and brakes therefor having different actuating parts an operatingdevice for said parts including a lever having a normal release po sition and arranged tobe moved therefrom in difi'erent planes to effect simultaneous or selective operation of said parts and a pivoted guard for the lever having cam portions adapted when the lever is returned from the selective operating positions to automatically shift it from the plane in which it moves to the plane which it occupies in said normal release position.

5. The combination with a vehicle frame having a plurality of traction members and brakes therefor having different actuating parts, an operatingmember for said actuating parts mounted for movement to dif ferent brake-applying positions, means for latching said member in one of said positions and a guard normally holding said member against movement to one brake-applying position, said guard being released by movement of said member from normal to a predetermined position.

v 6. The combination with a vehicle frame having a plurality of traction members and brakes therefor having different actuating parts, an operating member mounted for movement to efl'ect simultaneous or selective movement of said parts to brake-applying position, means for latching said member in one brake-applying position and a spring pressed guard for said member adapted to be released by the latter upon movement predetermined position;

7. The combination with a vehicle frame having a plurality of traction members and brakes therefor having different actuating parts including a pair of pivoted arms an operating lever mounted for movement from a normal .to a predetermined position from which position it is free to swing laterally.

in opposite directions to position it for selective operation of said arms and guard means for holding said lever against lateral movement in said opposite directions until moved to said predetermined position, said release the latter when the lever 'is movedguard means being moved by the lever to from; said normal to said predetermined position. l I

8. The combination with a vehicle-frame having a plurality of traction members and brakes therefor having difierent actuating parts, an operating lever arranged for movement in a plane from a normal brake release posit on toeiiect simultaneous movement of said parts, said lever being movable inv dif ferent planes to effect individual operation of said parts,'means for latching the lever When in position to effect simultaneous application of the brakes and yieldable guard means for holding the lever against movement from the first to the second mentioned planes until it is first moved from said normal position to'a predetermined position at which it is freed for movement; to the second mentioned planes, said guard means'being automatically movedbythe lever to release" the latter when said lever is moved from said normal to said predetermined position.

9. The combination with a vehicleframe I having a plurality of traction members and brakes therefor Ihavingdiiferent actuating parts, an upstanding lever arranged for movement in a substantially vertical plane from a normal brake release position to ef-' fect simultaneous operation of said parts,

said lever being mounted for movement to a selective position 'froinwhich it is movable laterally to different planes and subsequently in said planes to effect independent operation ofsaid parts and guard means forthe lever having a cam portion-with which the lever cooperates to eflect its, release when moving to said selective position.

10. The combination Witha .motor vehicle having a pair of differentially driven wheels and separate'brakes for saidv wheels, a selective control device for said brakesincluding separate actuating parts therefor and an op erating member movable from a normal brake release position in different-planes to effect selective operation of 'saidparts and a guard separate from said member arranged to hold, it against movement in said arate brakes for said Wheels, a pair of mov- V able'members for effecting operation of said brakes, a lever mountedto swing between said members and arranged for lateral move ment in different planes after movement from a normal to a predetermined position from which position it is movable to effect selective operation of said members by movement in said planes, saidllever being also movable from said" normal positionto effect simultas' neous operation of said -movable members, means for latchingthe' lever in one of its brake" applying positions and a guard. for holding said lever against movement in said planes until moved to said predetermined 'aosition, said guard being automatically movedl'by the ,Ile'ver torelease the latter'for movement n saidplanes when 1t ismoved to predetermined position. 7

12. The combination with a vehicle frame 'l aving a plurality of traction-members. and

brakes therefor having different actuating parts, parts mounted for movement from a normal to a predeterminedpositionfrom which po sition it is adapted for movement to different selective positions toeffect'separate operationof said parts and individual application l of tlie brakes and safeguard for. said operating device arranged to be movediby the latter; to

releasei. it.when moved to said predetermined positiom-said guard being also arranged to direct the operating device back to said predetermined position when 1 returning from 13. ,The combination withla vehicle frame either brake applying position:

having a plurality of. traction members and brakes therefor having different actuating an operating device forsa'i'd actuating parts, Jan operating device ,mounted for movement in different planes to effect independent operation of said partsand aguard for said operating device adapted to moved thereby when the operating device is moved in a predetermined plane to effect release thereof at a predetermined point from which the operating device is free to move in either of the first mentioned planes, said guard. serving to automatically return the operating device to the second mentioned plane'when itis returned frombrake applying position into engagement with the guard. I i 7 14. The combination with a motor vehicle having a pair of difierentially driven wheels and separate brakes for said wheels, a selective control device for said brakes comprising separate actuating parts and an upstanding lever movable from a normal brake release position to effect simultaneous orselective operation of; said parts and'a pivoted guard for said lever recessed to receive the lower endthereof and having inclined faces engaged by the lever whereby the latter when moved from normal position will effect release ofthe guard.

'15. In a brake mechanism of the class described, a support, a pair of actuating elements movable thereon and adapted for connection with separate brake devices, a brake voperating member for said elements mounted for movement to different selective posit ons to eifectindividual operation of said actuating elements anda guard for said member arrangedto be automatically moved to release position by movement of the member to a predetermined position in advance of its movement to said selective positions. 16. In a brake mechanism of the class described, a support, a pair of actuating ele mentfs movable thereon and adapted for connection with separate brake devices, a brake operating member mounted upon the sup? port to effect either selective or simultaneous operation of said elements and a guard for 7 said member arranged to be moved thereby to v releasenthe same for: selective operation I bymovement of said member 'to a predetermined position in advance of its movement to selective position.

'17. Ina brake mechanism of the class clescribed, a support, a pair ofactuating elements movable thereon and adapted for conn nection with separate brake devices, a brake operating lever mounted upon the support formovementin a plane to effect simultaneoushoperationof said elements and being also movable toeffect selective operation of the samevand'a'pivoted guard for the lever, said guard being automatically moved'to release the lever for selective operation by movement ofthe latterito a-predetermined position in advance of its movementto selectiveposition, the guard'being also constructed to automatically swing the lever into said plane when returning from selective'brake applying (position.

r FRANK W. PICHE. 

